Dynamo.



PATENTED OCT. 25, 1904.

I. DEUTSGH.

DYNAMO.

APPLIOA'I'ION TILED MAY 14. 1903.

3 SHEETS-SHEET l.

N0 MODEL.

Witnesses.

WLRZJ No. 773,129. PATENTED OCT. 25, 1904. I. DEUTSGH.

DYNAMO.

. APPLICATION nun MAY 14.71903.

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No. 773,129. PATENTED OCT. 25, 1904.

' 1. DEUTSCH.

DYNAMO.

v APPLICATION FILED MAY 14. 1903.

N0 MODEL.

3 SHEETSSHEET 3.

Ci/$11865 ea. v Inventor. 7 W JW JQwfiw/v ,g y jz dM/wMm /Zg Patented October 25, 1904..

UNITED STATES PATENT CEErcE.

ISIDOR DEUTSCH, OF MONTREAL, CANADA, ASSIGNOR TO ELECTRIC AND TRAIN LIGHTING SYNDICATE, LIMITED, OF MONTREAL, CANADA, A

CORPORATON OF CANADA.

DYNAIVIO.

SPECIFICATION forming part of Letters Patent No. 773,129, dated October 25, 1904.

Application filed May 14, 1903. Serial No. 157,148. (No model.)

To all whom, it ntay concern:

Be it known that I, ISIDOR DEUTSOH, a citizen of the United States of America, residing at Montreal, in the district of Montreal,

F in the Province of Quebec, Canada, have in vented certain new and useful Improvements in Dynamos, of which the following is a speciiication.

My invention relates to improvements in dynamos, and particularly those dynamos subject to variations in speed and direction or rotation; and the object of the invention is to devise a dynamo which shall include in its construction an automatic means of regulating the generation of the electric current therefrom; and it consists, essentially, of a dynamo-frame having plates suitably attached thereto in proximity to the bearing of the armature-shaft, a rheostat suitably located in the shunt field-circuit of the dynamo, and a row of contact-points having connection with the steps of said rheostat, adjustable coacting contact-points, a solenoid in the main circuit emanating from the dynamo and governing 5 the position of the said adjustable contactpoints, and a pole-changer operated from the dynamo-shaft, the various parts being constructed in detail as hereinafter more particu larly described.

Figure 1 is a perspective View of my dynamo. portion of the, regulating device. Fig. 3 is an elevation of the portion of the regulator shown in Fig. 2. Figs. L and 5 are perspective views relating to the operating-pawl. Fig. 6 is a perspective view of one of the teeth on the disk. Fig. 7 is a cross-sectional view of a portion of my device, showing the insulation from the revolving disk of the adj ustable contact-points and the insulation from the plate of the fixed contact-points. Fig. 8

is a diagrammatic view of the regulating portion of my device.

Like characters of reference indicate corresponding parts in each figure.

a is the frame of the dynamo, having the projecting frame 6 from one end, designed to serve as a bearing for the armature-shaft.

Fig. 2 is an enlarged plan view of a c is the armature of the dynamo, and (Z the commutator.

0 represents the fields, and f the armatureshaft.

' g is a plate securely bolted to the bearingframe 6.

it is a solenoid supported by the projecting 5 5 brackets 2' and y'from the plate 9. j The brackets i and 7' have the lugs k and Z turned upwardly and downwardly, respectively.

we represents contact points arranged in front of the plate a in the form of a dial and designed to have connection, each and every one, by means of a cable a with the steps of the rheostat 0, inclosed in the frame (6 of the, dynamo.

p is a disk journaled centrally on the pintle 5 qrinside the dial of contact-points m.

1' represents teeth superimposed on the face of the disk 1) in proximity to the outer edge and circularly arranged. The teeth r are spaced one from the other to correspond with 7 the contact-points m. The teeth 9* are substantially wedge-shaped-that is to say, the rearward portion is inclined or beveled to the face of the disk p.

8 represents teeth circularly arranged inwardly of the teeth r on the face of the disk 3), the space Z. being allowed between the circular rows of teeth 2 and s. The teeth .9 are identical with the teeth 0', but are superimposed on the face of the disk 2) so as to face in the opposite direction. In other words, they are reversely arranged from the teeth The rows of teeth are here described as being superimposed on the disk as the most preferable form of construction; but it must 5 be understood that they may form part of the same casting. A tooth is omitted in each of the rows to permit the free movement in the paths of the teeth of an engaging pawLhere- 'inafter described, when the cause for the ro-' tating of the disk 9 is not in evidence.

20 represents parallel arms pivotally swinging from the rods 4). The parallel arms a are pivotally connected to the core 20 of the solenoid h intermediate of their length.

m is a bar pivotally attached to the forked outer end of the parallel arms a. In the length of the bar a; and toward its lower end the said bar is spread to form an arc-shaped slot y.

.2' is a spiral spring connected to the upper parallel arm at and to the plate 0 and is designed to hold. the core of the solenoid.

2 is a worm at the outer end of the armature-shaft f and projecting outwardly from the bar.

3 is a worm-wheel meshing with the aforesaid worm and designed to turn the shaft 4. The shaft 4 turns on the bearings 5, arranged from the bearing-framel), and projects through the plate g at one end, while the other end operates a suitable pole-changer 6.

7 is an eccentric operated by the shaft 4: and located at the end of the shaft projecting through the plate 5 8 is an eccentric-strap, and 9 a connectingrod attached to said strap at one end and at the other pivotally attached to a rod 10, tn rning on the pintle q.

11 is a pawl of a hammer-head type and spring-held by the coil-spring 12 in the block 13, being pivotally attached to the lugs 14: from said block. The block 13 has an orifice 15 therethrough, corresponding to the size and shape of the rod 10, which is designed to be inserted therethrough.

16 is a screw or large-headed pin designed to extend through the slot 1 into the top of the block 13 and to have a free movement in the said slot.

It will be thus seen that any movement caused by the eccentric of the connecting-rod 9 will affect the rod 10, and as the rod 10 turns at its inner end on the pintle the position of the screw 16 in the slot 1/ will be affected, and consequently the position of the block will affect the pawl, as hereinafter more particularly described in the explanation of the operation.

17 represents contact-points corresponding to a rheostat-finger and designed to turn with the disk and contact with contact-points 1a in order to cut in and cut out resistance by means of the cable connections with the rheostat inclosed in the dynamo-frame c.

Having now described the parts in detail, 1 shall more particularly explain the operation thereof.

This dynamo, as stated in the foregoing, is particularly serviceable where the armatureshaft revolves at suddenly-varying speeds and may be termed an automatically-regulated dynamo. The resistance is designed to be located in the shunt field-circuit of the dynamo and may be a rheostat of any suitable form, though to be inclosed in the frame of the dynamo it necessarily must be compact. The cable of wires leading from the steps of the rheostat is connected, as aforesaid, with the various contact-pointsm respectively, and

the contact-points rotating with the disk 7) perform the functions of an ordinary rheostat-finger. The movement of this linger is controlled by the solenoid /1 located in the main circuit, designed to emanate from the dynamo, and the core of the said solenoid therefore becomes sensitive to each change in the strength of current. In consequence as the core is drawn toward the center of the solenoid the parallel arms a, which are attached to the core, swing on their pivotal bearings on the rods w. This in turn will affect the position of the slot 3/ over the face of the disk 7), and therefore the position of the pawl 11 is determined on the face of the disk 32 by the drawing in of the core w or the counteraction of the spiral spring The sprin is so adjusted that thepawl 11 will balance between the rows of teeth 7 and s when the armatureshaft maintains a definite speed for any given length of time or a definite strength of current is maintained; butimmediately the speed changes or the strength of the current changes the balance maintained by the arms is affected and the pawl thrown over to engage the outer or inner row of teeth, as the case may be. A constant reciprocatory motion is imparted to I the pawl 11 while the dynamo is in operation.

This is accomplished by means of the eccentric 7 turning in the strap 8. The rod 10, having a free turning movement on the pintle q and being pivotally attached to the connecting-rod 9, is kept moving constantly backward and forward, and as the said rod 10 is inserted through the block 3 the pawl 11 must be carried with the said rod in its movements. It has already been explained as to the sliding of the block on the rod 10 that is, being carried back and forth by the movement of the parallel arms '14 affecting the position of the slot ;1 It will now be seen that a reciprocatory motion of the pawl when the said pawl is located between the rows of teeth will in no way affect the position of the contactpoints 17; but on the sudden variation of speed in the revolutions of the armature-shaft or change in the strength of the current from other causes the pawl is brought into engagement with one or the other row of teeth, and the said teeth being so arranged as to face in opposite directions in the one case the pawl will pull and in the other case the pawl will push on the said teeth and in such a manner affect the position of the contact-points 17--- that is, by the turning of the disk 7) one way or the other and cut out or cut in resistance, as may be required to suitthe conditions then existing.

In the operation of the arms by the solenoid it will be understood that the current decreasing from any cause the magnetic influence of the solenoid and its core becomes less and the pull of the spring greater than the magnetic pull of the core. This will affect the position of the parallel arms, and consequently the position of the pawl on the face of the disk 1), as already stated.

It must be understood that, without departing from the spirit of my invention, instead of having a spring-held coreI may adopt equivalent means for the purpose.

In the illustration of my dynamo I have shown the pole-changer as forming part of the combination described herein; but the specific arrangement, construction, and operation of the pole-changer forms'no part of my present invention, and it is sufficient for the disclosure of my present invention to say that the shaft carrying the worm-wheel performs a twofold service, in that it operates the mechanism of the regulator and it also operates the pole changer, for which purpose it is provided with a crank-arm adapted to engage the arm 6 to move it from side to side as the revolution of the armature changes in direction.

In the earlier part of the specification it has already been explained that the pawl has a free movement in the paths of the rows of teeth where'a tooth in each row is omitted. This allowsthe pawl to continue in its reciprocatory motion idly when the armature-shaft is revolving slowly and the governing of current not necessary.

It will be noticed that the shaft carrying the worm-gear 3 and which operates the regulating means is also utilized for operating any suitable mechanism associated with the dynamo, and I have illustrated a pole-changer as a form of such mechanism which may be associated with the dynamo, though it will be understood that I do not wish to claim the pole-changer herein.

What I claim as my invention is 1. In a dynamo of varying speed, the combination with the frame, of a rheostat, a disk having circular rows of teeth on the face thereof facing in rows obversely, a solenoid having parallel arms connected by a bar at their outer ends, and intermediately to the core of the solenoid, a pawl having a limited movement in a lateral slot in said bar, and designed to engage the aforesaid row of teeth, and means from the armature-shaft for imparting to the pawl a reciprocatory motion, as and for the purpose specified.

2. In a dynamo of varying speed, the combination with the frame, of a rheostat, a disk having circular rows of teeth on the face thereof, facing in rows obversely, a solenoid having parallel arms connected by a bar at their outer ends, and intermediately to the core of the solenoid, apawl havingalimitedmovement in a lateral slot in said bar and designed toengage the aforesaid rows of teeth, a shaft journaled in suitable bearings from the frame of the dynamo, a worm-gear secured to the shaft, a worm at the end of the armature, a shaft meshing with the said gear rotating the shaft, an eccentric turning in a suitable strap at the end of said shaft, and connected to the pawl to give the same a reciprocatory motion, as and for the purpose specified.

3. In a dynamo of varying speed and direction, of a rheostat located in the shunt fieldcircuit of the dynamo, and contained within the frame, a row of contact-points in dial form on said plate, a disk journa'led in the said contact-points and having circular rows of teeth facing obversely, adjustable coacting contact-points insulated from and carried by said disk, a solenoid supported from the plate and having parallel arms pivotally connected to its core, a pawl designed to engage said rows of teeth, a bar connecting the ends of said parallel arms and spreading into a lateral slot in proximity to its lower end, a swinging arm journaled on a pintle forming the bearing of said disk, a shaft carrying the eccentric at its outer end, a worm and gear intermediate of its length operating the same, a connecting-rod pivotally connecting the eccentric-strap and the said arm, and a block carrying said pawl and held in said slot, as and for'the purpose specified.

4. In a dynamo of varying speed, the combination with the frame, of a rheostat, a disk suitably journaled and designed to carry the rheostat-finger, a row-of teeth havinga beveled rearward portion and circularly arranged on the face of said disk, a second row of teeth of similar construction arranged inwardly of the aforesaid row, and a pawl, a solenoid designed to govern the position of said pawl on the face of the disk, and means for imparting to the pawl a reciprocatory motion, as and for the purpose specified.

5. In a dynamo of varying speed, the combination with the frame, of a rheostat located within said frame, a plurality of contactpoints arranged in the form of a dial and suitably connected to the aforesaid rheostat, a finger having contact-points designed to rotate on the face of said dial, and automatic means for operating the said finger, as and for the purpose specified.

6. In a dynamo of varying speed, the combination with the frame, of a rheostat located within the said frame, a plurality of contactpoints arranged in dial form and having connection with the steps of said rheostat, a finger carrying contact-points at the ends there-- of, a solenoid, and means interposed between the said solenoid and finger to operate the latter, as and for the purpose specified.

7. In a dynamo of varying speed, the com- 8. In a dynamo of varying speed, the combination with the frame, of a resistance located therein, a plurality of contact-points arranged in dial form, and suitably attached to the bearing-frame, adjustable contact-points designed to coact with the aforesaid contact-points, a disk carrying the adjustable contactpoints, and journaled centrally on the said dial, a circularly-arranged row of teeth on the face of said disk, a second row of teeth reversely arranged inside the aforesaid row, a pawl designed to engage the said rows of teeth, parallel arms connected to the core of the solenoid, and through the solenoid regulating the position of the pawl on the face of the said disk, and means from the shaft of the armature for imparting to the pawl a reciprocatory motion, as and for the purpose specified.

9. In combination, a dynamo-frame, means for regulating the current of said dynamo suitably supported on the frame, the armatureshaft having a worm at its outer end, a shaft journaled in projecting bearings from the dynamo-frame, a gear on the said shaft meshing with the worm, said shaft being connected with the means of regulation to operate the same, and an operating connection extending from the other end of the said shaft, as and for the purpose specified.

10. In a device of the class described, a governor or regulator comprising a rheostat located within the frame of the dynamo, and having cable connection with acircular row of contact-points supported by the said frame, adj ustable contact-points, and means for changing their position operated by the variation in strength of the current, as and for the purpose specified.

11. In a device of the class described, in combination, a rheostatlocated within the frame, a plurality of contact-points arranged in dial form and suitably attached to the frame of the armature-shaft bearing, adjustable contactpoints designed to coact with the aforesaid contact-points, a disk carrying the adjustable contact-points suitably insulated therefrom, and journaled centrally on the said dial, a circularly-arrai'iged row of teeth on the face of the disk regularly spaced and having a double space between two of the teeth, a second row of teeth reversely arranged inside the aforesaid row and also having a double space between two of the teeth in the path of the row, a pawl designed to engage the said rows of teeth, parallel arms connected-to the core of the solenoid, and through the solenoid regulating the position of the pawl on the face of the said disk, and means from the shaft of the armature for imparting to the pawl a reciproeatory motion, as and for the purpose specified.

12. In combination with a dynamo, a rheostat in the field-circuit, regulating means, the armature shaft, a worm thereon, a worm- Wheel meshing with the said worm, a shaft extending at right angles to the armatureshaft, a connection at one end of the said shaft operating the regulator, the said shaft projecting beyond the worm-wheel at its opposite end with an operating connection on the said projecting end, substantially as described.

Signed at Montreal, in the district of Montreal, in the Province of Quebec, Canada, this 11th day of May, 1903.

1S1 DOB DE UTSCI'I.

Vitnesses:

H. T. TRO'P'IER, MAY MADDnN. 

